EXPERIMENTAL STUDY OF STABILITY OF PILED FOUNDATION WITH THERMOSYPHONS OF POWER TRANSMISSION TOWER ALONG QINGHAI—TIBET RAILWAY IN PERMAFROST REGIONS
JIANG Daijun1，2，WANG Xu2，LIU Deren2，XIA Qiong2
(1. Key Laboratory of Road and Bridge and Underground Engineering of Gansu Province，Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China；2. School of Civil Engineering，Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China)
Abstract：Power transmission towers along Qinghai—Tibet Railway line ran across permafrost regions. Frost uplifting failure of pile foundation is a prevail problem in permafrost regions. The Wangbu section in Qinghai—Tibet railway was selected as a test section for studying the application effect of thermosyphons in piled foundation of power transmission tower. Combining with the test section the field test and observation for the piled foundation with thermosyphons had been continued for two years. The changing rules of ground temperature field around pile，deformation at the top of piles，curves for ground temperature，negative accumulated temperature and permafrost table are obtained for both piled foundation with and without thermosyphons. The observed results show that in the piled foundation with thermosyphons the cooling effect is obvious，the frost- uplifting amount can be decreased，and the stability is better than that of the common piled foundation.
蒋代军1，2，王 旭2，刘德仁2，夏 琼2. 青藏铁路多年冻土地基输电塔热棒桩基稳定性试验研究[J]. 岩石力学与工程学报, 2014, 33(S2): 4258-4263.
JIANG Daijun1，2，WANG Xu2，LIU Deren2，XIA Qiong2. EXPERIMENTAL STUDY OF STABILITY OF PILED FOUNDATION WITH THERMOSYPHONS OF POWER TRANSMISSION TOWER ALONG QINGHAI—TIBET RAILWAY IN PERMAFROST REGIONS. , 2014, 33(S2): 4258-4263.
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2014, Vol. 33 
